标题: Double Z-Scheme g-C3N4/BiOI/CdS heterojunction with I-3(-)/I(-)pairs for enhanced visible light photocatalytic performance

作者: Zhang, Y (Zhang, Yan); Wu, YX (Wu, Yixiao); Wan, L (Wan, Liang); Yang, WF (Yang, Wenfeng); Ding, HJ (Ding, Huijun); Lu, CY (Lu, Chongyang); Zhang, WH (Zhang, Weihao); Xing, ZP (Xing, Zipeng)

来源出版物: GREEN ENERGY & ENVIRONMENT 卷: 7 期: 6 页: 1377-1389 DOI: 10.1016/j.gee.2021.08.0042468-0257 出版年: DEC 2022

摘要: The g-C3N4/BiOI/CdS double Z-scheme heterojunction photocatalyst with I3 -/I- redox pairs is prepared using simple calcination, sol-vothermal, and solution chemical deposition methods. The photocatalyst comprised mesoporous, thin g-C3N4 nanosheets loaded on flower-like microspheres of BiOI with CdS quantum dots. The g-C3N4/BiOI/CdS double Z-scheme heterojunction has abundant active sites and in situ redox I3 -/I- mediators and shows quantum size effects, which are all conducive to enhancing the separation of photoinduced charges and increasing the photocatalytic degradation efficiency for bisphenol A, a model pollutant. Specifically, the heterojunction photocatalyst achieves a photocatalytic degradation efficiency for bisphenol A of 98.62% in 120 min and photocatalytic hydrogen production of 863.44 mmol h -1g-1 on exposure to visible light. The excellent visible-light photocatalytic performance is as a result of the Z-scheme heterojunction, which extends absorption to the visible light region, as well as the I3 -/I- pairs, which accelerate photoinduced charge carrier transfer and separation, thus dramatically boosting the photocatalytic performance. In addition, the key role of the charge transfer across the indirect Z-scheme heterojunction has been elucidated and the transfer mechanism is confirmed based on the detection of intermediate I3- ions. Thus, this study provides guidelines for the design of indirect Z-scheme heterojunction photocatalysts. (c) 2022 Institute of Process Engineering, Chinese Academy of Sciences. Publishing services by Elsevier B.V. on behalf of KeAi Communi-cations Co., Ltd. This is an open access article under the CC BY-NC-ND license (http://creativecommons.org/licenses/by-nc-nd/4.0/).

作者关键词: g-C3N4; BiOI; CdS; Indirect Z-scheme heterojunction; I-3(-); I-pairs; Visible-light photocatalysis; BPA

地址: [Zhang, Yan; Wu, Yixiao; Wan, Liang; Yang, Wenfeng; Lu, Chongyang; Zhang, Weihao] Wuhan Univ, Coll Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430072, Peoples R China.

[Xing, Zipeng] Heilongjiang Univ, Sch Chem & Mat Sci, Dept Environm Sci, Key Lab Funct Inorgan Mat Chem,Minist Educ Peoples, Harbin 150080, Peoples R China.

[Ding, Huijun] Jiangxi Inst Water Sci, Jiangxi Prov Key Lab Water Resources & Environm Po, Nanchang 330029, Jiangxi, Peoples R China.

通讯作者地址: Zhang, WH (通讯作者)，Wuhan Univ, Coll Resource & Environm Sci, Hubei Biomass Resource Chem & Environm Biotechnol, Wuhan 430072, Peoples R China.

Xing, ZP (通讯作者)，Heilongjiang Univ, Sch Chem & Mat Sci, Dept Environm Sci, Key Lab Funct Inorgan Mat Chem,Minist Educ Peoples, Harbin 150080, Peoples R China.

电子邮件地址: weihao.zhang@outlook.com; xingzipeng@hlju.edu.cn

影响因子：12.781